MAX1615/MAX1616 19-1225 Rev 3 9/04 High-Voltage, Low-Power Linear Regulators for Notebook Computers General Description Features The MAX1615/MAX1616 are micropower, SOT23-5 lin- 4V to 28V Input Range ear regulators that supply always-on, keep-alive power 8A (max) Quiescent Supply Current to CMOS RAM and microcontrollers (Cs) in systems with high-voltage batteries. Key features include wide <1A Shutdown Supply Current input voltage range, low dropout voltage, and low qui- 3.3V or 5V, Pin-Selectable Output (MAX1615) escent supply current. Adjustable 1.24V to 28V Output (MAX1616) Despite a miserly 8A (max) no-load supply current, the MAX1615/MAX1616 have excellent line-transient 30mA Output Current response and AC power-supply rejection ratio. They 2% Initial Output Accuracy provide a clean, fixed 5V or 3.3V output (MAX1615) or an adjustable 1.24V to 28V output (MAX1616), even Thermal-Overload Protection when subjected to fast supply-voltage changes that 5-Pin SOT23 Package occur during the switchover from battery to AC adapter input power. The space-saving SOT23-5 package has Low Cost excellent thermal characteristics and tolerates up to 571mW of power dissipation. Fault protection is provid- ed by internal foldback current limiting and thermal- shutdown circuitry. The MAX1615/MAX1616 are now available in lead-free packages. Applications Ordering Information CMOS/RTC Backup Power PIN- SOT PART TEMP RANGE Microcontroller Power PACKAGE TOP MARK MAX1615EUK-T -40C to +85C 5 SOT23-5 ABZD Notebook Computers MAX1615EUK+T -40C to +85C 5 SOT23-5 ABZD Smart-Battery Packs MAX1616EUK-T -40C to +85C 5 SOT23-5 ABZE PDAs and Handy-Terminals MAX1616EUK+T -40C to +85C 5 SOT23-5 ABZE Battery-Powered Systems +Denotes lead-free package. Pin Configuration Typical Operating Circuit TOP VIEW OUTPUT IN OUT IN 1 5 SHDN VOLTAGE MAX1615 MAX1615 2 GND MAX1616 C C IN OUT BATTERY 0.1F 4.7F SHDN 3 OUT 4 5/3 (FB) GND 5/3 SOT23-5 ( ) ARE FOR MAX1616. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.High-Voltage, Low-Power Linear Regulators for Notebook Computers ABSOLUTE MAXIMUM RATINGS IN to GND .................................................................-0.3V to 30V Continuous OUT Current.....................................................40mA Terminal Voltages to GND Continuous Power Dissipation (T = +70C) (Note 1) A SHDN to GND...........................................-0.3V to (V + 0.3V) SOT23-5 (derate 7.1mW/C above +70C)...................571mW IN 5/3 to GND ............................................-0.3V to (V + 0.3V) Operating Temperature Range OUT FB (MAX1616) to GND .........................-0.3V to (V + 0.3V) MAX161 EUK-T ...............................................-40C to +85C OUT OUT to GND...........................................................-0.3V to 30V Storage Temperature Range .............................-65C to +160C OUT Short-Circuit to GND ...............................................30sec Lead Temperature (soldering, 10s) .................................+300C Note 1: See Operating Region and Power Dissipation section. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = 15V, SHDN = V , I = 5A, T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 2) IN IN LOAD A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Input Voltage Range V 428 V IN SHDN = IN, T = +25C 6.2 8 A Supply Current I A IN SHDN = IN, V = 6V to 28V, T = T to T 15 IN A MIN MAX Minimum Load Current 5 A T = +25C 1.5 A SHDN = GND Shutdown Supply Current I A IN (shutdown mode) T = T to T 3 MIN MIN MAX Output set to 5V, Dropout Supply Current T = +25C 70 A A V = 4V IN I = 1mA, LOAD 5/3 = GND 3.26 3.33 3.40 T = +25C, A 4.95 5.05 5.15 5/3 = OUT V = 6V to 28V IN Output Voltage (MAX1615) V (Note 3) I = 5A to 30mA, LOAD 5/3 = GND 3.15 3.48 T = T to T , A MIN MAX 5/3 = OUT 4.75 5.25 V = 6V to 28V IN T = +25C, A 1.215 1.240 1.265 I = 1mA FB Threshold (MAX1616) FB = OUT, LOAD V V FBT V = 6V to 28V (Note 3) IN T = T to T , A MIN MAX 1.18 1.28 V I = 5A to 30mA LOAD FB Input Current (MAX1616) I V = 1.3V -10 12 30 nA FB FB Dropout Voltage V I = 30mA (Note 4) 350 mV DO LOAD Output Current Limit V = 6V 100 mA IN OUT Reverse Leakage IN = unconnected, V forced to 5V 70 A OUT Current MAX1615 0.16 Capacitive Load F/mA Requirements (Note 5) MAX1616 0.23 Rising edge of IN or SHDN to OUT within specifi- Start-Up Time Response cation limits, R = 500 , C = 6.8F, 1 ms L OUT V set to 5V OUT R = 500 , C = 10F within 90% of nominal L OUT Start-Up Overshoot V 0.5 %V OSH OUT output voltage 2 MAX1615/MAX1616